The State Government has slammed Labor's promise to give Victorian workers a public holiday on AFL grand final eve if the Opposition wins November's state election.

Victoria's Opposition sports spokesman John Eren said families should have the chance to attend the AFL parade together on the Friday before the match or to travel around the state before tomorrow's game.

He said introducing an additional public holiday would be good for the economy.

"It would mean that more people could participate in the events that would be held today," Mr Eren said.

"People in regional areas could have BBQs, they'd have luncheons, clubs and pubs would be full.

"So this is very much not only to enjoy the wonderful game of football but also as an economic stimulus."

Labor first announced the policy earlier this year.

Victorians currently have 11 public holidays every calendar year, including Melbourne Cup day.

Treasurer Michael O'Brien said the idea of adding an extra holiday for AFL grand final eve was "economically reckless".

"To say to small business you either have to close down or pay your staff two and half times in penalty rates will simply send the message that this state is closed for business," Mr O'Brien said.

"The Treasury has estimated that the lost productivity to the economy would be $1.6 billion through an extra public holiday.

"The additional wages bill for small and medium businesses would be up to $200 million, that's not a way to grow jobs, that's a way to cost jobs."